Defines a heading angle, pitch angle, and range in a local frame.
Heading is the rotation from the local north direction where a positive angle is increasing eastward.
Pitch is the rotation from the local xy-plane. Positive pitch angles are above the plane. Negative pitch
angles are below the plane. Range is the distance from the center of the frame.
    
| Name | Type | Default | Description | 
|---|---|---|---|
heading | 
            
            Number | 
                
                    0.0
                
                 | 
            
            optional The heading angle in radians. | 
pitch | 
            
            Number | 
                
                    0.0
                
                 | 
            
            optional The pitch angle in radians. | 
range | 
            
            Number | 
                
                    0.0
                
                 | 
            
            optional The distance from the center in meters. | 
Members
    Heading is the rotation from the local north direction where a positive angle is increasing eastward.
    Pitch is the rotation from the local xy-plane. Positive pitch angles
are above the plane. Negative pitch angles are below the plane.
    Range is the distance from the center of the local frame.
Methods
staticCesium.HeadingPitchRange.clone(hpr, result) → HeadingPitchRange
    Duplicates a HeadingPitchRange instance.
    
| Name | Type | Description | 
|---|---|---|
hpr | 
            
            HeadingPitchRange | The HeadingPitchRange to duplicate. | 
result | 
            
            HeadingPitchRange | optional The object onto which to store the result. | 
Returns:
    The modified result parameter or a new HeadingPitchRange instance if one was not provided. (Returns undefined if hpr is undefined)
    
